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Finding the Fourth Proportional to 161.39, 241.57 and 84.25

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Solution

The fourth proportional to 161.39, 241.57 and 84.25 is: 126.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.39 : 241.57 = 84.25 : x
  2. Step 2: Convert to fraction form
    161.39/241.57 = 84.25/x
  3. Step 3: Cross multiply
    161.39x = 241.57 × 84.25
  4. Step 4: Simplify right side
    161.39x = 20,350.64
  5. Step 5: Solve for x
    x = 20,350.64/161.39
  6. Step 6: Final answer
    x = 126.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.